Corrections & minor changes for hopefully better clarity:

Aunt Jemima" is another term for such a Black woman {"Jemima is not used without the title 'Aunt'].

**

As I noted in my earlier comments, I believe that racism and the desire to maintain a fictional pure White race is the reason for the tradition of categorizing people of mixed racial ancestry as Black when one of the birth parents is Black. Theoretically, my view is that those people with that ancestry should be able to choose to belong to either and both of the races that their birth parents belong to. However, we live in the real world. And in today's real world of the USA, and most other nations, regardless of their physical appearance, persons of mixed Black/non-Black ancestry are considered to be Black, even if they call themselves 'biracial.'